Re: Turpentine vs. Linseed oil? 736 by James Morton on 08/04/01 at 10:34 AM
Re: Turpentine vs. Linseed oil?

In Reply to: Re: Turpentine vs. Linseed oil? posted by rhoward on 05/27/01 at 3:16 PM:

If it were only the Gamblins that were saying that much modern tube paint is underbound, then there would be cause for skepticism about this claim. However, it is in a soon to be released scientific study conducted at the conservation lab at the Smithsonian that these findings were made (albeit in research initiated and sponsored by Gamblin). It was found that much modern tube paint straight from the tube was prone to cracking with modest flexing of the substrate whereas tube color with a higher oil content could be tied like a rope without cracking. Of course, too much oil would hasten yellowing and slow drying so the oil content of the colors needs to be carefully attended too. Suffice to say, the oil content of many premium grade tube colors such as Old Holland is way too low for them to be used straight from the tube without the addition of oil. I would prefer to buy some of the cheaper student grade tube colors like Classico that have a higher oil content to begin with and save money as well. The economy grade oil paints such as Winton need to be avoided as they contain gelled oils. I have long noted that modern tube colors have too heavy a load of pigment and are not like the creamy tube colors of many years ago, now my impressions are being vindicated by science.





Follow Ups:

Re: Turpentine vs. Linseed oil? Rob Howard   Posted at: 08/04/01 (1)
Re: Turpentine vs. Linseed oil? James Morton   Posted at: 08/05/01 (0)

Post a Followup 553,558,584,736"> James Morton"> jmorton5_hotmail.comRe: Turpentine vs. Linseed oil?_08/04/01 at 10:34"Re: Turpentine vs. Linseed oil?"
: If it were only the Gamblins that were saying that much modern tube paint is underbound, then there would be cause for skepticism about this claim. However, it is in a soon to be released scientific study conducted at the conservation lab at the Smithsonian that these findings were made (albeit in research initiated and sponsored by Gamblin). It was found that much modern tube paint straight from the tube was prone to cracking with modest flexing of the substrate whereas tube color with a higher oil content could be tied like a rope without cracking. Of course, too much oil would hasten yellowing and slow drying so the oil content of the colors needs to be carefully attended too. Suffice to say, the oil content of many premium grade tube colors such as Old Holland is way too low for them to be used straight from the tube without the addition of oil. I would prefer to buy some of the cheaper student grade tube colors like Classico that have a higher oil content to begin with and save money as well. The economy grade oil paints such as Winton need to be avoided as they contain gelled oils. I have long noted that modern tube colors have too heavy a load of pigment and are not like the creamy tube colors of many years ago, now my impressions are being vindicated by science.

 
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